EP 3703052 A1 20200902 - ECHO CANCELLATION METHOD AND APPARATUS BASED ON TIME DELAY ESTIMATION
Title (en)
ECHO CANCELLATION METHOD AND APPARATUS BASED ON TIME DELAY ESTIMATION
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ECHOUNTERDRÜCKUNG AUF DER GRUNDLAGE EINER ZEITVERZÖGERUNGSSCHÄTZUNG
Title (fr)
PROCÉDÉ ET APPAREIL D'ANNULATION D'ÉCHO BASÉS SUR UNE ESTIMATION DE RETARD TEMPOREL
Publication
Application
Priority
- CN 201710994195 A 20171023
- CN 2018095759 W 20180716
Abstract (en)
An echo cancellation method and apparatus based on time delay estimation. The method comprises: acquiring microphone signals and reference signals and preprocessing same (101); determining frequency-point signals with a nonlinear condition in the preprocessed microphone signals and reference signals in a current echo cancellation scenario (102); according to frequency-point signals without a nonlinear condition in the microphone signals and the reference signals, obtaining, by means of calculation, a current time delay estimation value (103); moving the reference signals based on the current time delay estimation value (104); and according to the preprocessed microphone signals and the moved reference signals, updating a self-adaptive filter so as to realize echo cancellation (105). The present invention can improve the accuracy of time delay estimation and improve the echo cancellation effect.
IPC 8 full level
G10L 21/0208 (2013.01); G10L 21/0216 (2013.01)
CPC (source: EP KR US)
G10L 21/0208 (2013.01 - EP KR); G10L 21/0216 (2013.01 - EP KR); G10L 21/0232 (2013.01 - US); H04M 9/082 (2013.01 - EP KR); H04R 3/04 (2013.01 - US); H04R 29/004 (2013.01 - US); G10L 2021/02082 (2013.01 - US); G10L 2021/02163 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3703052 A1 20200902; EP 3703052 A4 20210428; EP 3703052 B1 20231101; EP 3703052 C0 20231101; CN 107610713 A 20180119; CN 107610713 B 20220201; ES 2965954 T3 20240417; HU E065351 T2 20240528; JP 2021500778 A 20210107; JP 7018130 B2 20220209; KR 102340999 B1 20211220; KR 20200070346 A 20200617; US 11323807 B2 20220503; US 2021051404 A1 20210218; WO 2019080552 A1 20190502
DOCDB simple family (application)
EP 18869573 A 20180716; CN 201710994195 A 20171023; CN 2018095759 W 20180716; ES 18869573 T 20180716; HU E18869573 A 20180716; JP 2020517351 A 20180716; KR 20207014264 A 20180716; US 201816756967 A 20180716